Remote controlled typewriter



May 3, 1960 M. P. MATTHEW REMOTE CONTROLLED TYPEWRITER Original FiledSept. 15, 1953 15 Sheets-Sheet 1 fIl'5 l "FIE-E May 3, 1960 M. P.MATTHEW REMOTE CONTROLLED TYPEWRITER Original Filed Sept. 15, 1953 15Sheets-Sheet 2 n\\\\\\\\\\\\\\\\\\\\ I I y 1960 M. P. MATTHEW 2,935,171

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REMOTE CONTROLLED TYPEWRITER Original Filed Sept. 15, 1953 15Sheets-Sheet 11 y 1950 M. P. MATTHEW 2,935,171

' REMOTE CONTROLLED TYPEWRITER Original Filed Sept. 15, 1953 15Sheets-Sheet 12 May 3, 1960 M. P. MATTHEW REMOTE CONTROLLED TYPEWRITEROriginal Filed Sept. 15, 1953 15 Sheets-Sheet 14 May 3, 1960 OriginalFiled Sept. 15, 1953 M. P. MATTHEW REMOTE CONTROLLED TYPEWRITER g k vdiv 1, 111%) NE E5 HM 15 m -1 a :b 0 CO 8c? Z Ep F 15 Sheets$heet 15 35AEE- FIE EEEIA Unitedstates Pa n REMOTE CONTRGLLED TYPEWRITER Morton P.Matthew, Silt/ermine, Conn, assignor to Friden, Inc., a corporation ofCalifornia Original application September 15, 15 53, Serial No. 380,241,new Patent No. 2,842,310, dated July 8, 1958. Divided and thisapplication December 9, 1957, Serial No. 701,385 1 7 Claims. (Cl.197-120) V This invention relates to calculating and recordingapparatus, and more particularly to the control of the carriagemechanism of the recording apparatus, and is a. division of Patent No.2,842,310 issued July 8, 1958 and entitled Typewriter ControlledCalculators.

An object of the invention is to provide the carriage of the recordingapparatus with remotely controlled line spacing and tabulatingmechanism. I

Another object of the invention is the provision of an improvedtabulating mechanism in the recording apparatus providing a plurality ofelectrically controlled tabulator stops.

Another object of the invention is to provide a plurality or" tabulatorstops controlled electrically to determine selective positioning of thecarriage in the recording apparatus. Another object of the invention isthe provision of improved control means for a recording apparatusselectively operable to provide a predetermined number of tabulatorstops for the carriage of a recording apparatus and to predetermine thedegree of rotation of the platen in the carriage.

A further object of the invention is to provide the platen in thecarriage of a recording apparatus with an electrically settable linespacing control mechanism.

Other objects and advantages of the invention will become apparent fromthe following description of a preferred embodiment as illustrated inthe accompanying drawings in which:

Fig. l is a. view in perspective of a complete assembly of the improvedtypewriter and calculator apparatus mounted in an improved ofiice desk;

Fig. '2 is a schematic view of the apparatus shown in Fig; 1 andshowsthe arrangement of the typewriter, calculators and control unitwhich comprise the machine;

Fig. 3 is a side view, partly in section, of a portion of a typewritermodified in accordance with this invention and showing a switch operatedby a typewriter type mechanism and also a typical solenoid whichoperates a typewriter numerical key;

Fig. 4 is a side view of a portion of a calculator showing solenoidsmounted on the calculator and operable to operate push keys and anothermovable member of the calculator and operable to control variousoperations in the calculator;

Fig. 5 is an enlarged front elevational view of the left and leftcentral portions of a selection solenoid unit involving a solenoidcontrolled system of gates and a stepping cam shaft for controlling theoperation of the selecting slides of a calculator;

Fig. 6 is a complemental figure to Fig. 5 and shows the right and rightcentral portions of the selection solenoid unit; some of the parts andportions thereof shown in the right-hand portion of Fig. 5 are shownagain in the left-hand portion of Fig. 6;

' Fig. 6A shows the stepping cam shaft shown in Figs. 5 and 6, thestepping cam shaft being broken at one point 2,935,171 iatented May 3,19t5l'l and shown in two parts merely for convenience in getting theillustration in the available space on the drawing;

Fig. 7 is a top plan view of the selection solenoid unit;

Fig. 8 is a front view of a portion of the upper central portion of theselection solenoid unit shown in Fig. 7 and taken on the line 88 of Fig.7 in the direction of the arrows;

Fig. 9 is a side view, partly in section, of a portion of the calculatorselection mechanism and selection solenoid unit including a solenoidcontrolled escapement for the stepping cam shaft employed in theselection unit of the calculator for controlling the setting of theselecting slides of the calculator, the view being taken on the planessubstantially as indicated by lines 9'9 of Fig. 5;

Fig. 10 is a top view of a portion of the structure shown in Fig. 9 andwith the solenoids removed, the view being taken on the line 1010 inFig. 9;

Fig. 11 shows a ratchet control for the stepping cam shaft operable tocause a back spacing movement of the parts and shows means for rotatingthe calculator selection stepping cam shaft in a direction opposite tothe normal direction of escapement;

Fig. 12 is an enlarged view of a triple spacer mech anisrn provided inthe typewriter and a solenoid control member for operating the triplespacer mechanism;

Fig. 13 is a top view of the parts shown in Fig. 12;

Fig. 14 is a side elevational view of the program switch unit involvinga set of motor driven cams and a set of Acre-switches;

Fig. 15 is an end view of the unit shown in Fig. 14;

Fig. 16 shows the cams employed in the program switch;

Fig. 17 is a plan view of a carriage stop bar provided on the typewriterand a solenoid to cam the bar downward from the position shown forinterposing two additional tabulator stops on the typewriter;

Fig. 18 is a view of the parts shown in Fig. 17 but with the bar cammeddown by the solenoid to a required perating position;

Fig. 19 shows a simplified diagram of the electrical circuit of themachine, part of which is shown schematically;

Fig. 19A is a duplicate of Fig. 19 showing reference numerals giventhroughout this description;

Fig. 20 shows a bank of numeral switches employed in connection with thetypewriter bars;

Fig. 21 shows a bank of solenoids for operating the typewriter numeralbars after a calculation is made;

Fig. 22 shows how the sheets showing Figs. 20 to 26A, inclusive, may berelatively arranged to facilitate an understanding of the machine;

Fig. 23 is a circuit continuation of the circuits shown in Figs. 20 and21, and shows the control unit numeral relays;

Figs. 24 and 24A show the electrical circuits of the A and B calculatordial readout units;

Figs. 25 and 25A show the electrical circuits of the A calculatorselection unit; and

Figs. 26 and 26A show the electrical circuits of the ,B calculatorselection unit.

The apparatus provided in this invention comprises anelectricaltypewriter, an electrical calculator, and a program control apparatusall connected in an electrical system.

The typewriter is operable to type letter and number symbols on papersheets when the keys of the typewriter are manually operated in theusual way. It is also operable, through switches associated with movableparts of the key-controlled members, to set up contact conditions in acontrol unit to control the operation of an electrical calculatorconstructed along the general lines ofa type frequently employed inmaking arithmetical calculationsQ The typewriter is also operablethrough a set V of solenoids, under control of the calculator throughthe control unit, to print on the bill amounts calculated and Theprincipal components of this machine are: (a) One typewriter.

(b) Two calculators (one or more could be used). (c) One control unit.

The typewriter and calculator are provided with an electrical input andoutput. In general, any output can transmit numerical information to anyinput, or combination of inputs. The transmission of any output to anyinput or inputs, is always via the ten numeral control relays in thecontrol unit. Whether or not a certain output is transmitting to acertain input or inputs is determined by certain elements to be coveredlater. The

transmission of numbers is always sequential, i.e., only one digit at atime may be transmitted.

TYPEWRITER NUMERAL SWITCHES The output for the typewriter consists of abank of switches closed by the respective numeral type bars.Mechanically, these are shown in the upper part of Fig. 3. Theseswitches set up contact conditions in the control unit to control theoperation of an electrical calculator. Electrically, these switches areshown in Fig. 20.

TYPEWRITER KEY SOLENOIDS The typewriter key solenoids comprise thetypewriter input. These solenoids, under control of the calculator byway of the control unit, print the bill amounts calculated andaccumulated in the calculator(s). Mechanically, these are shown in thelower part of Fig. 3. Electrically, these are shown in Fig. 21.

CALCULATOR ACCUMULATOR READOUT In calculators of the general type thatmay be employed in this invention, multiplier means are provided inorder that base amounts may be multiplied a required number of times andby a predetermined multiplier figure. A dividend figuring meansrepresented by a movable tabulator button, commonly called a dividendentry key, is also provided in the calculator. Calculators foundsuitable for use in the present invention might be, for example, of thetype shown in C. M. Friden et al., Patents Nos. 2,399,917 and 2,403,273,issued May 7, 1946 and July 2, 1946, respectively, but modified in somerespects to make them more suitable for control through electricalsystems.

' When the typewriter and calculators are equipped and arranged asindicated in this invention and the typewriter and calculators aresuitably conditioned and operated, a base amount may be typed on a bill,a percentage of the base amountmay be calculated and subsequently typedon the bill, and a total of the base amount and percentage may becomputed and typed on the bill with- 4 set to calculate 25% of a taxableitem entered in the second calculator.

The 15% taxable items are typed in the left-hand amount column of thebill by the typewriter and, in doing this, the position of the carriageof the typewriter is utilized to operate a switch to switch intoconnection with the typewriter, the A calculator.

The 25% taxable items and other than the 15 taxable items are typed inthe right-hand amount column and, in doing this, the position of thecarriage of the typewriter is utilized to switch into connection withthe typewriter, the B calculator.

During the computing cycle, the totals in the calculators are read outand printed, the taxes are computed and printed and the respectivetotals added to them. For the grand total, the amount in the Bcalculator is read out and automatically put into the A calculator andis subsequently read out and transferred to the typewriter to operatethe typewriter to print the grand total.

In order that the typewriter may control the operation of thecalculators, electrical switches are mounted in the typewriter, suchswitches being operated by some moving parts of the mechanism operableeach time a number key of the typewriter is operated. The electricalswitches that apply to the typewriter are in control of an electricalcontrol unit located between the typewriter and the calculators; thecontrol unit being operable to control the calculators in accordancewith the numerals typed by the typewriter and required to be entered andaccumulated in the calculators. The calculator employed in each case is,in general, a conventional form of calculator, but for the purpose ofmaking it adaptable for use in the invention, it is modified by removingthe numeral keyboard and providing in place thereof a selector unit forcontrolling the selecting slides of 'the calculator. The control unitwhich, in the present illustration, is common to the two calculators,involves a cam equipped program control unit and a system of relayscontrolled by the program control unit, and the key-controlled switchesof the typewriter, and is operable to control a solenoid selector unitin each calculator and solenoids operable to operate push-type controlkeys of the calculators;

As shown in Fig. 1, the complete apparatus comprises four main units,namely, an electrically operated typewriter 101, a first calculator 102,a second calculator 103, and a control unit 104, the typewriter 101,calculators 102, 103 and the control unit 104 being mounted in amodified office desk 105 equipped with a hinge-supported out requiringany manual or mental figuring of the percentageor total, and without anymanual typing of the percentage and total.

The apparatus of this invention is suitable for use as a billing machineand may be used to considerable advantage in preparing bills fortelephone or other services wherein some of the items charged on thebill are taxable and the taxes must be computed during the preparationof the bill. The apparatus shown herein and described is suitable forpreparing a telephone bill in which a plurality of kinds of telephonecalls are charged on a bill and two of the kinds of services are taxableat difierent rates. In order to take care of the two difierent rates oftaxation, two calculators A and B are provided, each being set tocompute a tax of a predetermined difierent'percentage. For example,-onecalculator A may be set to compute 15% of a taxable item entered in thecalculator and the second calculator B might be back door 106.

As shown in Fig. 2, the typewriter 101, the calculators 102, 103 and thecontrol unit 104 are electrically connected for automatic operationthrough the wire systems 107, 108 and 109, all of which are fed from asupply line 110 equipped with a plug 111 that may be connected to asuitable source of current supply, not shown. The typewriter 101, asshown briefly in Fig. 3, comprises a suitable frame 112 in which aremounted sets of manually operable keys 113 operable through linkages 114to cause key bars 115 carrying type symbols 116 to strike a platen 117.The keys 113, linkages 114, key bars 115 and type symbols 116, as wellas the platen 117, are conventional in electrically operatedtypewriters. in the present invention, however, the typewriter has beenmodified by the addition of solenoids 181 to operate the keys 113 andconsequently cause the key bars 115 to operate to bring the type symbols116 into engagement with the platen 117. The typewriter 101 has alsobeen modified by the addition of a set of Acro-switches 166, mounted ona suitable apertured bar 120 which is mounted in the typewriter 101 sothat it extends transversely across the position of linkages 114 in thetypewriter structure. Bar 120 supports movable pins 126 and comprises abracket portion 121 bolted in place by the bolts 122, the bracket 121being apertured to receive mounting bolts 123 which extend throughapertures in the switches 166. The linkages 114 are operable to move thepins 126 to operate the switches 166.

CONTROL BOX Added to the typewriter and located to the right of thekeyboard, is a box containing control keys K K and K two indicatinglamps, one red and one yellow, and a four-pole double-throw switch891-N. All are shown in the circuit diagram in Fig. 19, and the box canbe seen in Figs. 1 and 2.

SELECTING SLIDES The selecting slides in calculators of the type shownin Figs. 1 and 2, are arranged in pairs so that there is a separate pairof selecting slides for each order of digits. One selecting slide in thepair is operable by keys representing digits from 1 to 5, inclusive, andthe other selecting slide in the pair is operable by keys representingdigits from 6 to 9, inclusive. When keys representing digits from 1 to 5are operated in a particular order or column, one of the selectingslides of the pair serving that order is moved against the action of itsrestoring spring. When keys representing digits from 6 to 9, inclusive,are operated in the same particular order, the other selecting slide ofthe pair is operated. Each selecting slide controls the positioning of agear relative to an actuator, comprising a toothed rotatable cylinder,the actuator being operable through the gear controlled by the selectingslide, and a system of gears to drive the numeral wheels in a registerpart of the calculator.

In the present invention the selecting slides are normally spring-loadedand are selectively released by operation of a stepping cam shaft 146(Figs. 5, 6 and 6A) which trips latches on the selecting slides to allowthe selecting slides to move against a system of gate bars 234 to 237,inclusive, which are operated to control the extent of movement of theselecting slides. The gate bars are moved by means of levers which areoperable by means of the solenoids 491, 499, 506, 513 and 526, which areselectively operated either by operation of numeral keys of thetypewriter 101 when records are being put into the calculator 192 or103, or by operation of the readout means comprising numeral wheeloperated switches in the calculator. The stepping cam shaft 146 isrotatable and longitudinally movable and is positioned transversely ofthe selecting slides 54 to 65, inclusive, as shown in Figs. 5 and 6, andin position to control the levers 201 to 212, inclusive, provided on theselecting slides 54 to 65, inclusive. is provided with the cams 14a) to145, inclusive, which are progressively distributed in a helical patternabout the cylindrical outer surface of the shaft, as shown in Fig. 6A.Normally, the stepping cam shaft 146 is positioned so that, uponsuitable rotation of the shaft, the cam 140 will extend into a spacebetween the selecting slides 54 and 55, the cam 141 will extend into aspace between the selecting slides 56 and 57, the cam 142 will extendinto a space between the selecting slides 58 and 59, the cam 143 willextend into a space between the selecting slides 60 and 61, the cam 144will extend into a space between the selecting slides 62 and 63 and thecam 145 will extend into a space between the selecting slides 64 and 65.In this position, if the stepping cam shaft is rotated, the cams on thestepping cam shaft will have no effect on the levers 201 to 212,inclusive, or the selecting slides 54 to 65, inclusive. The stepping camshaft 146, however, is longitudinally movable to either the right or theleft as required to bring the cams 140 to 145, inclusive, in registerwith the latches on the right-hand selecting slides of each pair or thelefthand selecting slides of each pair. The digits in the typewriter andthe calculator from 1 to 9 are divided into two orders; namely, a loworder for 1 to 5 and a high order from 6 to 9. In the calculator Thestepping cam shaft 146 and with reference to Figs. 5 and 6, theselecting slides 54, 56, 58, 60, 62 and 64 are the selecting slides forthe low order digits in the calculator. The selecting slides 55, 57, 59,61, 63 and 65 are the selecting slides for the high order digits in thecalculator. When a key in the typewriter 101 is depressed to type arequired digit on a record sheet, suitable solenoids in the selectorsolenoid control unit 400 are energized to insure that the requireddigit will be entered into the calculator, in cases where a calculationis required.

With reference to Figs. 7 and 8 and assuming that the digit operated inthe typewriter is of a low order, from 1 to 5, the solenoid 426 in thecontrol unit 400 will be energized to cause the shaft 146 to move to theleft of the position shown in Figs. 5 and 6. This will bring the cams onthe stepping cam shaft 146 into register with the latches on theleft-hand selecting slides 54, 56, 58, 60, 62 and 64 in the calculatorand, upon suitable rotation of the stepping cam shaft 146, the cams to145, inclusive, will individually operate to release an associated latchon a selecting slide of the low order, the selecting slide being, inturn, released to bear against the system of gate bars 234 to 237,inclusive. If the digit to be entered into the calculator is a digit 1,the solenoid 491 will be operated to operate the levers 450 and 451 toselectively position the gate bars 234 to 237, inclusive, to suchrelative positions that the appropriate left-hand selecting slide in thecalculator will be permitted to move downwardly under the action of itsspring to bring a required gear in the calculator into engagement withthe appropriate actuator in order that the required digit may be enteredinto the calculator. If the digit key operated in the typewriter is oneof a high order, from 6 to 9, the solenoid 427 in the selector solenoidcontrol unit 490 will be energized to move the cam shaft 146 to theright of the position shown in Figs. 5, 6 and 6A. In this case, when thecam shaft 146 is suitably rotated, the cam 140 will have the effect ofreleasing the selecting slide 55; cam 141 will have the effect ofreleasing the selecting slide 57; cam 142 will effect releasing of theselecting slide 59; cam 143 will effect releasing of the selecting slide61; cam 144 will effect releasing of the selecting slide 63; and cam 145will effect releasing of the selecting slide 65. Release of theselecting slides will bring them into control of the gate bars 234 to237, inclusive, which are selectively controlled for movement to therequired positions by operation of the solenoids 491, 499, 506, 513 and526. If the high order digit to be entered is the digit 9, the solenoid513 will be energized to operate the levers 481 and 482 to relativelyposition the gate bars 234 to 237, inclusive, so that the high orderselecting slide for the digit 9 will be allowed to pass through thegateways in the gate bars 234 to 237, inclusive, to bring the gearsystem in the calculator into position for operation by the actuator forthe digit 9 in the calculator to enter into the calculation, the digit9.

The gate bars 234, 235, 236 and 237 may be relatively moved to positionsto permit the selecting slides in the calculator to move to positionsfor putting into the calculation the digits 1 to 9, inclusive, byselective operation of the solenoids in the selector solenoid controlunit 400. By operation of the solenoids in combination as follows, thedigits 1 to 9 may be entered in the calculator: Solenoids 426 and 491for the digit 1; solenoids 426 and 499 for the digit "2; 426 and 506 forthe digit 3; 426 and 513 for the digit 4; 426 and 526 for the digit 5;427 and 491 for the digit 6; 427 and 499 for the digit 7; 427 and 596for the digit 8; 427 and 513 for the digit The shaft 146 is operable tobe rotated in one direction against the action of a spring 152 and iscontrolled in its reverse rotation by means of an escapement 147 (Figs.9 and 10) involving the ratchet wheel 148 and the pallet 149. The pallet149 is operable in one direction by means of the plunger 552 of asolenoid :7 553 against the action of a return spring 554, one end ofwhich is secured to the pallet 149, the other end being attached to afixed support. Operation of the solenoid 553 steps the stepping camshaft 146 one escapement step for each pulse to permit the calculator torecord a zero.

The ratchet wheel 148 has a special tooth 135 of such dimension that itwill not pass free of the sides of the slot 561 in the stop 558 when theshaft 146 is moved lengthwise. This prevents further progressiveescapement of the cam shaft 146 when the special tooth 135 reaches thestop 558.

The stepping cam shaft 146, as shown in Fig. 11, may be backspaced insteps by operation of a solenoid 539, the plunger 540 of which bearsagainst a pivotally supported pawl 541 operable downwardly under thethrust of the plunger 540 and against the pinion 542 on the shaft 146.The solenoid 539 may be under control of a corresponding solenoid, orrelay, in control of the backspace member on the typewriter 101.

CONTROL OF FUNCTIONAL KEYS IN CALCULATORS The calculators employed inthis apparatus are provided, as shown in Fig. 4, with solenoid membersto control various functional keys, or other usual manually operablemembers of the calculator, to make the calculator operate to add,subtract, multiply or calculate numbers as required. The solenoids maybe controlled from a typewriter position and through a suitable controlunit. As shown in Fig. 4, there is a solenoid 543 having a plunger 544in engagement with a dividend key 545 on the calculator. There is also asolenoid 546 having a plunger 547 in engagement with the minus key 548of the calculator; a solenoid 549 having a plunger 550 in engagementwith the add key 551 of the calculator; a solenoid 555 having a plunger556 in engagement with a lever 557 is provided to control themultiplication apparatus of the calculator. Energization of thesolenoids 543, 546, 549 and 555' abovementioned would be equivalent tomanual depression of the usually manually operated functional keys ofthe calculator. Since the solenoids can be remotely controlled, they maybe controlled either from a typewriter position or from a suitablecontrol box located at some convenient point and from a control unitoperating to make the typewriter apparatus and the calculators gothrough required cycles of operations in recording numerals, calculatingamounts, taking percentages of amounts, summing up the amounts andtypewriting the amounts on a suitable record sheet. Since thecalculators are provided with solenoid means to operate various controlkeys thereof and with solenoid controlled means for operating theselecting slides of the calculator, and with the solenoids, in controlof a calculator, under the control of the keys of a typewriter, it isquite apparent that required amounts may, in effect, be put into thecalculator apparatus by operation of the digital keys of a typewriter;that the calculator may be set into operation to add, subtract, ormultiply the amounts accumulated therein, and that the calculator maybe, in efiect, made to read back into the typewriter and C control thetypewriter keys to type the amounts accumulated and calculated in thecalculator.

As shown in Figs. 20, 21, 23, 24, and 25, an electrical system isprovided between the typewriter apparatus 101 and the calculatingapparatus 102, 103. Fig. shows a set of switches 166 operable by meansof the numeral type bars of typewriter keys 129 shown in Fig. 3. Fig. 23shows a set 167 of control unit relays which are operable to relaysignals from the typewriter to the calculators, and from the calculatorsto the typewriter, or from one calculator to another, or to itself. Inthe typing-in operation, the relays in the set 167 are controlled bymeans of the switches shown in Fig. 20, the control unit relays 167being operable to control a set of solenoids in the solenoid selectorunit 400 shown in Figs. 3 and 6 and contained inthe calculator. Thecontrol unit relays 167 arealso in circuit connection with readoutselector switches shown in Fig. 24, and which are supported on parts ofthe calculator apparatus involving numeral wheels of the calculator andthe carriage of the calculator apparatus. The switches of Figs. 24 and24A are used as readout switches to read out amounts accumulated in thecalculators. Figs. 25, 25A, 26 and 26A show the selection gate solenoidsand the escape shaft solenoids of the selector solenoid unit 490, whichare in circuit connection with the control unit relays shown in Fig. 23.The selector solenoid unit 400 is also shown in Figs. 7 and 8. Both setsof solenoids shown in Figs. 21 and 25 are con trollable either together,or one set at a time, by the control relays shown in Fig. 23. Theswitches 166 shown in Fig. 20 are controlled by means of the typewritermember keys representing the numbers from 0 to "9 and are identified inFig. 20 as T T T T T T T T T and T switches, there being duplications ofthe switches T T T and T by reason of the automatic two-digit keys onthe typewriter. Each of the switches 166 can be closed by operation ofthe associated typewriter key to control an associated control unitrelay in the set of relays 167, shown in Fig. 23, and numbered from 1 to0. The relays 167, shown in Fig. 23, are used in extending the controlfrom the typewriter switches 166 to, in the first place, solenoids,shown in Fig. 25, in the selector solenoid unit 400, shown in Figs. 5,6, 7, 8 and 9, and comprising in each calculator the solenoids 491, 499,506, 513, and 526, which are operable to selectively control the set ofgate bars 234, 235, 236 and 237, which are selectively operated tocontrol the movement of selecting slides in the calculators A and B,shown in Figs. 1 and 2. When the switches 166 are operated by means ofthe typewriter keys and the corresponding control unit relays 167 andaccompanying switches, shown in Fig. 23, representing the same numeralsrepresented by the depressed typewriter keys, the required solenoids inthe selector solenoid unit 400 are suitably operated to selectivelyoperate the gate bars in the selector solenoid unit 400. Thus, theselecting slides in the calculating machines A and B will be selectivelyoperated so that the calculating machines A and B will record on theirnumeral wheels, the number represented by the depressed keys of thetypewriter. The calculating machines A and B will record, in the usualmanner on their numeral wheels, numbers indicating the amounts that havebeen fed into the calculating machines A and B. The numeral wheels ofthe calculating machines A and B will also operate corresponding readoutswitches, movable parts of which are applied to the numeral wheels ofthe calculating machines A" and B." The readout switches are shown inFigs. 24 and 24A, and may be equal in number to the number of numeralwheels provided in the calculating machines A and B, but for the purposeof illustrating this invention,'ouly four readout switches have beenshown, the readout switches being numbered 169, 170, 171 and 172. Thereadout switches 169, 170, 171 and 172 comprise, respectively, a set ofradially arranged fixed contacts 173 and a'wiper contact 174, a set ofradially arranged fixed contacts 175 and a wiper contact 176, a set ofradially arranged fixed contacts 177 and a wiper contact 178 and a setof radially arranged fixed contacts 179 and a wiper contact 180. The

switches 169, 170, 171 and 172 will represent, by the positions of theirwiper contacts on their sets of relatively fixed contacts, the amountsaccumulated in the calculating machines A? and B, and may be broughtinto circuit connection with the control unit relays, as shown in Fig.23, to, in effect, read out from the calculating machines the amountsaccumulated therein, the readout being by way of contacts controlled bythe control unit relays 167, shown in Fig. 23, and carrying the readoutinformation to the typewriter to operate the set of type writersolenoids 181 representing the numerals 1 to "0, inclusive. In theOperation of recording on the numeral wheels, the calculator is operatedto go through its conventional plus or minus cycles.

READOUT OPERATION Upon operation of the readout switches 169, 170, 171and 172 to control the control unit relays 167, shown in Fig. 23, in thereadout operation, the corresponding typewriter solenoids 181 will beoperated to operate the typewriter keys to typewrite the numbersrepresented on the numeral wheels of the calculating machines A and Band indicated by the positions of the readout switches 169, 170, 171 and172. For example, if the typewriter key representing the numeral 1 isoperated, the control unit relay 1 in the set of relays 167 will beoperated to control the operation of the selecting solenoid unit 400 tooperate the solenoids 426 in the A or B calculators, and operate thesolenoids 491 in the A or B calculators, which thereupon will registerthe numeral 1" in the switches 169 or 171. Selection of the calculator Aor B will depend on the nature of the entry and the relative positionsof some of the parts of the typewriter. When the apparatus issubsequently operated to read out from the calculating machines A or Band into the typewriter, the control unit relay #1 in the set 167 willbe operated to extend the control from the selector switches 169 or 171to the typewriter 101 so that the typewriter solenoid #1 in the set oftypewriter solenoids 181 will be operated and the typewriter keyrepresenting the 1 will be operated to print the l on a record sheetsupported on the platen of the typewriter machine. The circuit for theinput to the calculator can be traced as follows: in Fig. 19, conductorL conductor 182 to 730, 727, 728, 191, 193, 192, 183, 194 to switch T inFig. 20, represented in three places by movable contacts 11-1 which maybe closed against corresponding fixed contacts 1 1 and 1 in circuitconnection with respective conductors 184, 185 and 186, leading toconductor 187 in cable 107. From conductor 187 to conductor 188 (Fig.23), winding of relay #1 of the numeral relays 167, conductor 189,conductor 190, conductor 1094 (Fig. 19) to line wire L In the typing-inoperation, the position of the column in which the record is being madedetermines whether the amount being put into a calculation will go intothe A or B calculators. The A and B calculators may be set for differentmultipliers. For example, the calculator may be set to calculate 15% ofamounts entered therein and the B calculator may be set to calculate 25%of the amounts entered in the B calculator. A switch is provided on thetypewriter and controlled by cams on the carriage to control theentering of amounts in the A and B calculators.

For another example, and assuming that the number typed by thetypewriter 1131 was 6, and the amount should be entered in the Acalculator, the circuit would be as follows: Line wire L (Fig. 19),conductor 182, conductor 730, movable contact 727, lefthand fixedcontact 728, conductor 191, movable contact 193, left-hand fixed contact192, conductor 183, conductor 194, to movable contact of T (Fig. 20), tothe fixed contacts thereof, conductor 195, conductor 196, winding ofrelay #6 of the group of relays 167, shown in Fig. 23, conductor 197,conductor 198, conductor 190, conductor 1094 (Fig. 19), to line wire LRelay #6, upon being operated, will close its movable contacts 199 (Fig.23), against its fixed contacts 100, 85, 98 and 97. Through its fixedcontact 97 and conductor 96, the circuit will be extended from line wireL conductor 90, conductor 79, conductor 89, movable contact 88, fixedcontact 97, over conductor 96, conductor 95, conductor 94 of cable 93(Fig. 25A), winding of solenoid 427 in the A calculator, conductor 92,conductor 91, and ultimately to line wire L by way of conductor 942(Fig. 19), left-hand fixed contact 1095, movable contact 971, conductor972, left-hand fixed contact 1096 of switch P movable contact 870,left-hand fixed contact 879, movable contact 880, conductor 882,left-hand fixed contact 883, movable contact 884, conduc tor 886,right-hand fixed contact 887, movable contact 888 of switch T point 770,conductor 771, point 772, right-hand fixed contact 752 of switch Tmovable contact 753, conductor 755 to line wire L Assuming that thedigit "6 should be entered in the B calculator, relay #6, throughoperation of its movable contacts 199 and against its fixed contacts,establishes another circuit as follows: Line wire L conductor 90 (Fig.23), conductor 79, conductor 89, movable contact 88B, fixed contact 98,conductor 96B, conductor 948 (Fig. 26A), winding of solenoid 427,controlling the escapement shaft of the B calculator, conductor 92B, andultimately to line wire L by way of conductor 916 (Fig. 19), conductor94S, left-hand fixed contact 946, movable contact 947, conductor 927,left-hand fixed contact 928 and movable contact 888 of switch T point770, conductor 771, point 772, right-hand fixed contacts 752, andmovable contact 753 of switch T conductor 755 to line wire L Operationof solenoid 427 conditions the escape shaft solenoid control for the Bcalculator so that operation of solenoid 491 of the selection gatesolenoids in the B calculator will control the gate bars so that aselecting slide for the numeral 6 will be operated in the B calculator,and the numeral wheel for the B calculator will move its wiper contact174 (Fig. 24A) to a fixed contact representing the numeral 6. Thecircuit through the solenoid 491 may be traced as follows: Conductor 90(Fig. 23), conductor 89, set of movable contacts 199, movable contact86, fixed contact 85, conductor 84, conductor 83 (Fig. 26), winding ofsolenoid 491, conductor 82, conductor 993, conductor 991 (Fig. 19) toline wire L After the numeral "6 or any other numeral has been put intoeither or both of the calculators, the numerals can be read out from thecalculators to the typewriter. The readout circuit for the numeral 6registered in the A calculator may be traced as follows: Line wire L(Fig. 19), conductor 934, point 935, movable contact 936, right-handfixed contact 1020, conductor 74, readout contact 75, wiper contact 180(Fig. 24), selector switch 172, fixed contact 6 of selector switch 172,conductor 168, cable 1100, conductor 196, winding of relay #6 of relays167 (Fig. 23), conductor 197, conductor 198, conductor 198, conductor1094 (Fig. 19), to line wire L Relay #6 in operating, closes itsoutermost movable contact against fixed contact 100 to close the circuitfor the energization of solenoid S in the solenoids 181 in thetypewriter. When the solenoid S in the typewriter is 0perated, thetypewriter operates to print the numeral 6 on a record sheet supportedon the platen'of the typewriter. The circuit for the energization ofsolenoid S may be traced as follows: Line wire L conductor (Fig. 23),conductor 79, conductor 89, outermost movable contact 80 of relay #6,contact 100, conductor 740 through cable 734, winding of solenoid S(Fig. 21), conductor 50, conductor 77, conductor 76, conductor 965 (Fig.19), movable contact 963 and fixed contact 964, conductor 966, conductor967, left-hand fixed contact 968 and movable contact 799 of switch Pconductor 750, conductor 751, point 772, right-hand fixed contact 752and movable contact 753 of switch T conductor 755 to line wire LCalculators of the type above-mentioned are provided with function keysto be operated to make the calculator operate to add, subtract, multiplyand do various other calculations mechanically. The function keys aredepressible keys and are usually operated manually. In this inventionsolenoids are provided to operate the usual depressible function keys,with exception of those not required for this invention, on thecalculator, the solenoids being arranged, for example, as shown in Fig.4, in which the solenoid 543 is operable to depress the dividend key

